ENVR 1101 Lecture Notes - Lecture 5: Electromagnetic Radiation, Homeostasis
4 Oct 2016
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Most biological tissues are 90+ % carbon + oxygen + hydrogen (bones are the exception) Micro and trace nutrients (0. 1& or less) = everything else that is needed in small but critical amounts. Lead is problematic at just about any concentration. Carbon does not bind well to many rock minerals, so there is a lot of this in the atmosphere. Most of the biomass that"s in our bodies comes from the atmosphere. Atoms can get reconnected, rearranged, and transformed, but nothing is lost. If you bury something underground it"s still there, might start leaking, etc. (if broken down, becomes less harmful, but still stays there) Nuclear: radioactive decay and nuclear reactions release heat. Work can be measured by the amount of energy that"s getting transformed. Power is rate at which work is done or rate at which energy is consumed. Running is twice the work done (energy consumed)
